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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '894d724f0203b10c2218243e1b76ea449507a2d481438a96888c33f8f0bbeb82' 
  AND token = 'ofv75gtEKnB34sCIGiRv5JNtPK2ZpFX3SvmS8gWV4cs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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