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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'df635583d98f5398d2137edf934857e9c72bb24077df87a839e1b46d1d487bce' 
  AND token = 'e58i3hpswysQJ1ZxYbav02e6XO75Ic2c9JPXAzGNWAs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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