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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0118a66496ba91b3ad419caff55620e2c8909feab0aa30979e0984fbebec8e4e' 
  AND token = 'abLJmbpzWttW/YGQZU7f5Fm2TLfn1Da4BPnlr1mUZV4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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