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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '022b30e9afdaa0a0ac97d0dc2e32528b890f95d4886f9401b7c89c02177bfe3c' 
  AND token = 'Le8YEDqm6a4DNeoXb1BNxM85W9918E8kg10REt1f/dQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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