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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ecdad341b216c98ccf2032905bed811b406c25097150e326e8c47fca8ef7046c' 
  AND token = 'nxKrOQfLESa7B/LAfqLzLE7cYVnEOWavX/u0W10T86Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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