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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '56b60dd4a5917ee6d0b5fb3e4cc64abd62e7f0360efecb9d8fdaa1a04330f7aa' 
  AND token = 'b7ILKnz+sZa21J389qS7//crV0myk0ZDO88flyLHdag=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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