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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '554279f9bd07f34c09c17fe9f3357d5a823001de373f9ec004801e39812c3eaf' 
  AND token = 'BJmhKgBtNmRb6G5GEm9CBtP4rA7ycNxv+6F+LEMrT08=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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