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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5ca197f31644aac95c1c65c146febb30ed63aefa5e53464d81a8ec407f534c6d' 
  AND token = 'h1yznQOe9DVBUhKtl6gBUzUA/GCZF8AE0En/PL3luiQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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