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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59d8060bc0a5d49fc5306b3d75d63a2fbdcbd90506c9594cc895450e1972a062' 
  AND token = '97csrK0fvBaqmQMp1/YCNWqAh0Akkla4BAFduVHtR/s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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