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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aabcce6c7959a581bb196c60e55fc4178bb0b1d64dacf179a6a00fc306afd9ad' 
  AND token = 'GMhFj/W147vX0RW4MDzFXQf6ct3HH62wTWxDb2a4lAU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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