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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0007f134f3a63c6af9d3f2dd1dbf8b76a9bb4a0ad18e06f915c0e99495bf7f84' 
  AND token = 'VH9Nh1a0BVUm+zKxnroW0QXLoU10nZIojf70Njm6Ki4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}