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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bcb26d90d62d7ae2d3e69639f9eb2e1cc4cacf24fe03ffe09f2c81ed5cce8dfb' 
  AND token = '6G1Blgjc8FpxK9eQChWoI/W7IK3CyjIhvIpX9drc1/c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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