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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '63c66a212abab32c46a06db6396e1c9c58016987c524233f667ab58c83ca150a' 
  AND token = 'aCsZ0qhdft2MePVPbTu0jRE2hnEQ+9hDp1MA6m0g+HE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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