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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '095c685416712804dd3d6a9f29ea2c361fb0c2509e6b04b4043fb4e6a4c2f07e' 
  AND token = 'ZVhh0viR6GI1BZvlSeYNjhYWMdMC3h9SH2phCtsf52k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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