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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11048a777e60b2be58ea8e885c8eaeb0c4b630614ab1e6ec69e13786c2132241' 
  AND token = 'SNWEvk52CKUjCnFP+/X8uLFNDUMLzJ/rn1Nn4Ax504w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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