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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2dea12c8e17e751b84d2b97ae7f9fd8313717d3103b1885ff73a72d9248105d7' 
  AND token = '5t7m5eAs1qqS0HnG5F5BC5RPsHRK/hByxrvpVxBUPdU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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