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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1111661dc79571a0253eb4a60cd38a7cbb2bdad2f5dc84ded829af02af5ab0ef' 
  AND token = 'fhICQvrfFqqlLst7G5uROZAc/4gg7cCw9Aq6DO0nrjk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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