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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b24f76c50266efb1671327b112cb0b194fab21b411f40e807062d04a72e5a2ca' 
  AND token = 'WHdUy598Jk9gZf7lLFN91Qif/EmSQp/Iw2avnvKWj1A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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