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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7c7e8378b535d0e48f714dbe87d06a17ad170f5b2d0140fa4aeddae428aa416a' 
  AND token = '3DmGsknRRFC+6QsRei27t/+lUbYC15pkpu2Ya7mG2K0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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