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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd9234c801c059c766ba38b2d0a9fa7a282bebf488a3b9a658bf91fd97b8ef3ab' 
  AND token = 'X8kW10rFjdh6E1wXVlmDGp8xm5MUapHT7QN1zd18KpI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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