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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e159bf2de26fc9e107f68d036cd02c2f7585b7cab126affce4b0224ceec6076' 
  AND token = 'xgh+eUuubvvmn5HMDjBREyd2iApVD0v7rKpWfj5PP7I=' 
  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"
    }
  }
}