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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0667dbe7694dd4dd7422948b95daf94b9659704a2fd1b0c00f6e0d0ce91721d8' 
  AND token = 'mPRLykaG+8aNg/ULbWMdQ5reEg+lIIHU1XW+31/fick=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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