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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba8cc08add8b4fc685c07b9100ee3344d8e6cd267bea303d30bcbd6274fed31a' 
  AND token = 'Tlz++B3pbNWkX753s3T2oR6c5Av4XCPw1InrZoDD2iA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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