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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bd26c55973de803417cbe4cf18cf695e0e8388c92afb219ee1a2a74e295b8b75' 
  AND token = 'cE1ogg8s0MY3n6LNAjubIIiNbjl3f0XXZSvvf52gosY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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