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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14c0622258a530102059035e7774aa04690daa221706ea85959d7b3072e20388' 
  AND token = 'rXETiuO5r8h6pi8K5h7lBolPmFTN4EMNr3Pdi747U6o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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