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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f245ef1166558e5453d2066bcf38c50e958ec1ee39bc1809b5e081659a3e2d9c' 
  AND token = '32lkzPQ+ntsKK3c9rl74KiGJPUqfkEBRYSKGeX1j2c0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}