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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01f1ba057a7a63f92cc70f3413252db6a1c778dc85e4dd610deb0601923654e9' 
  AND token = 'HtKl5wm2ixaRyj5K+3KJ0MkmNZkqbwZIbzYoJcAaYj0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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