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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e0719c06b2868dc809105d99bb0c69725ac81694e072212358934a9c1b1569de' 
  AND token = '36ckRR0RIBYBT57G4iKUDhSPKoXazGuDmjKrtAHXkoc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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